1) dissymmetric Gemini
不对称Gemini
1.
Progress in dissymmetric Gemini surfactants;
不对称Gemini表面活性剂研究进展
2.
A series of dissymmetric Gemini surfactants with the structure of(C_(12)H_(25)(CH_(3))_(2)N~(+)(CH_(2))_(4)N~(+)(CH_(3))_(2)C_mH_(2m+1)),denoted as C_(12)-4-C_m(m is 14,16,18),have been synthesized with N,N-dimethylalkylamine and 1,4-dibromobutane as the initial reagents.
以N,N-二甲基脂肪胺和1,4-二溴丁烷为原料,合成了一系列具有不同疏水链的不对称Gemini表面活性剂C12H25(CH3)2N+(CH2)4N+(CH3)2CmH2m+1(C12-4-Cm,m=12,14,16,18),并通过1H NMR(核磁共振氢谱)、MS(质谱)和元素分析等方法鉴定其结构。
2) Asymmetric Gemini surfactants
不对称Gemini表面活性剂
1.
Asymmetric Gemini surfactants CmH2m+1OCH2CH(OH)CH2N+(CH3)2C8H17Br,referred to as CmOhpNC8(m=10,12 and 14),were synthesized.
合成出由1个亚甲基联接羟基和季铵基头基,且带两根不同长度烷烃链的不对称Gemini表面活性剂CmH2m+1OCH2CH(OH)CH2N+(CH3)2C8H17Br(记为CmOhpNC8,m=10,12,14)。
3) Dissymmetric photosensitive Gemini surfactant
不对称光敏Gemini表面活性剂
4) asymmetric
[英][,eɪsɪ'metrɪk] [美]['esɪ'mɛtrɪk]
不对称
1.
Screening of microbe for asymmetric reduction of prochiral aryl ketones and characterization of the reduction reaction;
不对称还原前手性芳香酮微生物的筛选及反应特性
2.
Ethylene polymerization by novel asymmetric dinuclear titanium metallocene complexes;
新型不对称双核茂金属钛催化剂催化乙烯聚合
3.
Analysis of asymmetric running and its protection circuit for triphase asynchronous motor;
三相异步电动机相间功率不对称现象分析及保护电路设计
5) asymmetry
[英][æ'simitri] [美][e'sɪmɪtrɪ]
不对称
1.
Quantitative Description of Anisotropy and Asymmetry by Using Rock Permeability Parameters;
渗透率参数的各向异性和不对称性的定量描述
2.
Facet Joint Asymmetry as a Radiologic Feature of Lumbar Intervertebral Disc Herniation in Children and Adolescents;
小关节不对称—青少年腰椎间盘突出症的放射学特征
3.
Optimal Design for Cross Section of Expressway Based on Asymmetry Development;
基于不对称开发的快速路横断面优化设计
补充资料：对称与非对称
反映客观事物在结构、功能、时空上的特殊联系的范畴。对称指事物以一定的中介进行某种变化时出现的不变性，非对称指事物以一定的中介进行某种变化时出现的可变性。在自然界中普遍存在，形式多样。对称有空间对称(包括形象对称和结构对称)、时间对称、概念对称等。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条